<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right" class="setstl">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>权限列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
      <!-- 角色列表区域 -->
      <el-table :data="rolesList" stripe border class="setpad">
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom',i1 === 0 ? 'bdtop':'','vcenter']"
              v-for="(item1,i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 二级权限渲染 -->
                <el-row
                  :class="[i2 === 0 ? '':'bdtop','vcenter']"
                  v-for="(item2,i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row,item2.id)"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限渲染 -->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      closable
                      @close="removeRightById(scope.row,item3.id)"
                      v-for="(item3) in item2.children"
                      :key="item3.id"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column prop="roleName" label="角色名称"></el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <!-- 编辑按钮 -->
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row.id)"
            >编辑</el-button>
            <!-- 删除按钮 -->
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeRolesById(scope.row.id)"
            >删除</el-button>
            <!-- 分配权限按钮 -->
            <el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
              <el-button
                type="warning"
                icon="el-icon-setting"
                size="mini"
                @click="showSetRightDialog(scope.row)"
              >分配权限</el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加用户的对话框 -->
    <el-dialog title="添加角色信息" :visible.sync="addDialogVisible" width="50%" @close="addDialogClose">
      <!-- 内容主体区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部按钮区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改用户的对话框 -->
    <el-dialog
      title="修改用户信息"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form :model="editForm" ref="editFormRef" :rules="editFormRules" label-width="100px">
        <el-form-item label="角色 ID">
          <el-input v-model="editForm.roleId" disabled></el-input>
        </el-form-item>
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部按钮区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRolesInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightsDialogVisible"
      width="50%"
      @close="setRightsDialogClosed"
    >
      <!-- 树型控件 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightsDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
import {
  userRoles,
  addRoles,
  rolesInfo,
  editRoles,
  removeRoles,
  showRight,
  allotRights,
  removeRight
} from "@/api/rights";

export default {
  data() {
    return {
      // 角色列表
      rolesList: [],
      // 控制添加角色对话框的显示与隐藏
      addDialogVisible: false,
      // 添加角色表单数据
      addForm: {
        roleName: "",
        roleDesc: ""
      },
      // 添加角色表单的验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" }
        ],
        roleDesc: [{ message: "请输入角色描述", trigger: "blur" }]
      },
      // 修改用户的表单数据
      editForm: {},
      editFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" }
        ],
        roleDesc: [{ message: "请输入角色描述", trigger: "blur" }]
      },
      // 控制修改用户对话框的显示与隐藏
      editDialogVisible: false,
      // 控制分配权限对话框的显示与隐藏
      setRightsDialogVisible: false,
      // 获取权限列表
      rightsList: [],
      // 树型控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children"
      },
      // 默认选择的节点
      defKeys: [],
      roleId: ""
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    // 获取角色列表
    async getRolesList() {
      const res = await userRoles();
      if (res.meta.status !== 200)
        return this.$message.error("获取角色列表失败！");
      this.rolesList = res.data;
    },
    // 监听添加用户对话框的关闭事件 重置数据
    addDialogClose() {
      this.$refs.addFormRef.resetFields();
    },
    // 点击按钮，添加新角色
    addRoles() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return;
        const res = await addRoles(this.addForm);
        if (res.meta.status !== 201) {
          this.$message.error("添加用户失败！");
        }
        this.$message.success("添加用户成功！");
        // 隐藏添加用户的对话框
        this.addDialogVisible = false;
        // 重新获取用户列表数据
        this.getRolesList();
      });
    },
    // 展示编辑用户的对话框
    async showEditDialog(id) {
      const res = await rolesInfo(id);
      if (res.meta.status !== 200) {
        return this.$message.error("查询用户信息失败");
      }
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    // 监听修改用户对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    // 修改用户信息并提交
    editRolesInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return;
        const res = await editRoles(this.editForm);
        /*  console.log(res) */
        if (res.meta.status !== 200) {
          this.$message.error("更新用户信息失败！");
        }
        this.$message.success("更新用户信息成功！");
        // 关闭对话框
        this.editDialogVisible = false;
        // 刷新数据列表
        this.getRolesList();
      });
    },
    // 删除角色
    removeRolesById(id) {
      this.$confirm("此操作将永久删除该角色, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
        // 确认后的操作
      })
        .then(async () => {
          const res = await removeRoles(id);
          if (res.meta.status !== 200) {
            return this.$message.error("删除用户失败！");
          }
          this.$message.success("删除用户成功！");
          this.getRolesList();
          // 失败后的操作
        })
        .catch(() => {
          this.$message({
            type: "info",
            message: "已取消删除"
          });
        });
    },
    // 根据ID删除对应权限
    removeRightById(role, rightId) {
      this.$confirm("此操作将永久删除该权限, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning"
      })
        .then(async () => {
          const res = await removeRight({ roleId: role.id, rightId });
          if (res.meta.status !== 200) {
            return this.$message.error("删除权限失败！");
          }
          this.$message.success("删除权限成功！");
          // 返回的data, 是当前角色下最新的权限数据
          role.children = res.data;
          // 失败后的操作
        })
        .catch(() => {
          this.$message({
            type: "info",
            message: "已取消删除"
          });
        });
    },
    // 展示分配权限对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      const res = await showRight("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限列表失败！");
      }
      this.rightsList = res.data;
      // console.log(res.data)
      this.getLeafKeys(role, this.defKeys);
      this.setRightsDialogVisible = true;
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前node节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }
      // 不是三级节点调用递归函数
      node.children.forEach(item => this.getLeafKeys(item, arr));
    },
    // 监听分配权限对话框的关闭事件 重置数据
    setRightsDialogClosed() {
      this.defKeys = [];
    },
    // 点击为角色分配权限
    async allotRights() {
      // 合并半选和选中的节点权限id
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ];
      // 以 `,` 分割的权限 ID 列表（获取所有被选中、叶子节点的key和半选中节点的key, 包括 1，2，3级节点）
      const idStr = keys.join(",");
      const res = await allotRights(this.roleId, { rids: idStr });
      if (res.meta.status !== 200) {
        return this.$message.error("分配权限失败！");
      }
      this.$message.success("分配权限成功！");
      this.getRolesList();
      this.setRightsDialogVisible = false;
    }
  }
};
</script>

<style lang="scss" scoped>
.setpad {
  margin-top: 15px;
}
.setstl {
  padding: 10px 0;
}
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-top: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>